A convenient synthesis of bromodifluoromethyl-substituted alkenes
作者:Chang-Ming Hu、Jian Chen
DOI:10.1016/0022-1139(93)03051-m
日期:1994.10
Various functionalized bromodifluoromethyl-substituted alkenes have been prepared by addition of dibromodifluoromethane to functionalized alkenes promoted by a CrCl3/Fe bimetal redox system, followed by dehydrobromination with KF/Al2O3.
Synthesis of bromodifluoromethyl-substituted alkenes. Potassium fluoride supported on alumina as a dehydrobrominating agent
作者:Chang-Ming Hu、Jian Chen
DOI:10.1016/0022-1139(93)02954-d
日期:1994.1
Potassium fluoride supported on alumina is an efficient dehydrobrominating agent. 1,3-Dibromo-1,1-difluoroalkanes - adducts of dibromodifluoromethane and alkenes - give bromodifluoromethyl-substituted alkenes 2 on dehydrobromination with this agent in good to excellent yields. Alkenes 2 were a mixture of Z- and E-isomers, with the former predominating. Functional groups such as ester, carbonyl, ethylenic and chloromethyl are not affected under such reaction conditions.
Oxidant-induced addition reaction of perfluoroalkyl halides to alkenes and alkynes
作者:Xiao-Chuan Guo、Qing-Yun Chen
DOI:10.1016/s0022-1139(97)00132-2
日期:1998.2
Ceric sulfate, cerium(IV) ammonium nitrate, sodium persulfate, ammonium persulfate and potassium permanganate can smoothly induce the addition reaction of perfluoroalkyl halides (1) to electron-rich olefins (2) and alkynes (4) to give monoadducts (3 or 5). The perfluoroalkyl radical generated via possible pathways from 1 is discussed. (C) 1998 Elsevier Science S.A. All rights reserved.
Chen, Jian; Hu, Chang-Ming, Journal of the Chemical Society. Perkin transactions I, 1994, # 8, p. 1111 - 1114
作者:Chen, Jian、Hu, Chang-Ming
DOI:——
日期:——
ELSHEIMER, SETH;SLATTERY, DARLENE K.;MICHAEL, MARIANA;WEEKS, JENNIFER;TOP+, J. ORG. CHEM., 54,(1989) N6, C. 3992-3993